McDowell,+Evan



1. Argon Ar. 18 39.95 Gas

2.discovered by Lord Rayleigh and Sir William Ramsay in 1894.


 * 1) 3. It is used in electric light bulbs and in fluorescent tubes at a pressure of about 400 Pa. and in filling photo tubes,glow tubes, etc. Argon is also used as an inert gas shield for arc welding and cutting, as blanket for the production of titanium and other   <span style="font-family: Algerian; font-size: 20pt; line-height: 115%; mso-ansi-language: EN-US; mso-bidi-font-family: 'Times New Roman'; mso-bidi-language: AR-SA; mso-bidi-theme-font: minor-bidi; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin; msoansilanguage: EN-US; msobidifontfamily: 'Times New Roman'; msobidilanguage: AR-SA; msobidithemefont: minor-bidi; msofareastfontfamily: Calibri; msofareastlanguage: EN-US; msofareastthemefont: minor-latin;">reactive elements, and as a protective atmosphere for growing silicon and germanium crystals.

4. The modern things it is used in is light bulbs, and in fluorescent tubes.

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